Goat format ruling
Hyper Hammerhead

Card effect (current official text)At the end of the Damage Step, if an opponent's monster that battled this card is not destroyed: Return that opponent's monster to the hand.
Rulings
- Hyper Hammerhead's effect activates at the time that a monster would be sent to the GY.
- Even if Hyper Hammerhead was destroyed, its effect resolves.
- The effect of Hyper Hammerhead can be chained to.
- If you have another effect that activates at the end of the Damage Step, you can place it on a chain with Hyper Hammerhead's effect (such as Hyper Hammerhead vs. Hyper Hammerhead).
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.